TestTraceflow/testTraceflowIntraNode/traceflowGroupTest failed frequently

[tnqn]

Describe the bug

It failed at least 4 times in different PRs in a single day.
https://github.com/antrea-io/antrea/actions/runs/7044794096/job/19173712483
https://github.com/antrea-io/antrea/actions/runs/7040962487/job/19173091498?pr=5755
https://github.com/antrea-io/antrea/actions/runs/7040962487/job/19163032995?pr=5755
https://github.com/antrea-io/antrea/actions/runs/7040962487/job/19163033469?pr=5755

[tnqn]

@gran-vmv @luolanzone

[hangyan]

Progress:
case 1 / packet header mismatch: added detailed log output, waiting for more occurrence.
case 2 / timeout: no findings yet, antrea logs didn't show any errors / clues, considering adding more log to identidy the specific test object.

[tnqn]

The flake has been happening for months and caused many reruns, and I'm concerned it may mean users could also encounter the timeout when they already meet a real connectivity issue and try to debug using Traceflow, which would cause a pretty bad impression. I could help take a look if the problem is unclear yet.

[hangyan]

The flake has been happening for months and caused many reruns, and I'm concerned it may mean users could also encounter the timeout when they already meet a real connectivity issue and try to debug using Traceflow, which would cause a pretty bad impression. I could help take a look if the problem is unclear yet.

Sure thanks. I have examined the related logs(2 cases before) but it shows that all the test traceflow objects has been reconcile successfully, in a short time period. I was planning to also print the specific traceflow name in tests code to help narrow down the scope in the following occurrences. (#5953 )